Exam 15: Global Soils

On the illustration, the soil at M is:

Granular or blocky structures tend to be easy to cultivate.

The soils associated with low humus content, high salts, and long dry periods are:

Extremely small mineral or organic particles that can remain indefinitely suspended in water are:

Spodosols are generally highly fertile and naturally agriculturally productive.

Soil forms fairly quickly at a rate of about an inch a year.

The soil order occurring in isolated areas with a very high organic content is the:

Decomposition of organic matter to humus is called:

On the illustration, the letter that represents colloid-sized particles is:

Spodosols are often called peat or muck.

On the illustration, the soil at K is:

Colloids help plants absorb nutrients.

Low latitude soils are all of the following EXCEPT:

On the illustration, the soil at G is:

_________ have developed in the moist climates of the equatorial, tropical, and subtropical zones on land surfaces that have been stable for long periods.

___________ are mineral soils without distinct horizons.

O horizons are mineral horizons.

The most obvious property of soil is its texture.

Larger than granule peds, ____________ peds are thin, flat soil masses, looking much like a stack of pancakes, occur near the surface and are associated with soil compaction.

Low latitude soils are spodosols, ultisols, and oxisols.